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downsides to changing oil every 6k miles vs 12k?
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11-23-2011, 07:55 PM | #23 | |
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As others here have mentioned, oil analysis actually helps you determine how long to run your oil for your application. For my M3 motor, Blackstone recommend 8K miles for my next change (assuming I continue highway/city driving). |
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11-23-2011, 08:48 PM | #24 | |
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11-23-2011, 10:24 PM | #25 | |
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You only need a couple of oil analysis reports to learn the optimum change interval for your application. There is no need to keep sending the oil in once you have the OCI dialed in, unless you just want to or unless you drastically change the service of the vehicle, i.e., switch from all highway to all city. Guessing the condition of your oil is just that. PS - did you ever unplug your gas gauge? I think one of your last off-topic rants indicated that you should just fill up more often and you never have to worry about how much gas you have. |
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11-24-2011, 12:51 AM | #27 |
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Used oil analysis tells you the condition of the oil. See SAE Technical Paper 2003-01-3119 on oil change frequency. New oil increases wear over used oil.
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11-24-2011, 07:09 AM | #28 | |
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As I've stated a gazillion times on this forum, I've had three BMW's, 1989 E30 (256,000 miles), 1997 Z3 (150,000 miles still in service), and 2006 E90 (161,000 miles still in service). All bought new, all followed BMW's OCI: the E30 - about every 10,000 miles, the Z3 - about every 11,000 miles, the E90 - about every 17,500 miles. No engine failures. Since experience negates ignorance, I'll state I'm far from ignorant on the subject. Also, I have a full autoshop in my garage, with a lift, air tools, and a full compliment of hand tools worth well over $4,000; so considering that level of investment in DIY maintenance, I think it’s fair to say I'm not mechanically unsympathetic. BMW already did the testing for me. They've "dialed in" the OCI already; you just don't believe them. And BMW's testing was done under proper test conditions, which we've already gone over previously, unlike an UOA from Blackstone labs. |
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11-24-2011, 08:49 AM | #29 | |
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oh sorry, WHO CARES. An oil change takes a socket wrench...and oil/filter. If with all your mighty experience and tool chest you care to do the bare minimum, knock yourself out. This tread is about oil changes either every 6k or 12k miles, not the size of your gonads. (notice sarcasm) Last edited by TotalPower; 11-24-2011 at 09:23 AM.. |
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11-24-2011, 09:18 AM | #30 | |
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I don't have that many socks. |
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11-24-2011, 11:52 AM | #31 | |
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And (again) until you can come up with a justification better than "BMWs are known to consume oil" (what internal combustion vehicles do not?), there is no proof that the BMW CBS changes are harmful. Tom |
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11-24-2011, 12:33 PM | #32 | |
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11-24-2011, 03:12 PM | #33 |
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11-25-2011, 03:32 AM | #36 | |
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"Antiwear Performance of Low Phosphorus Engine Oils on Tappet Inserts in Motored Sliding Valvetrain Test" and it analyzes the antiwear capability of phosphorus in oils only. |
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11-25-2011, 09:02 AM | #37 | |
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Again, the question asked was: "what is the downside of switching your oil early/late?" What happens if you forget and are a couple hundred or a thousand or two miles late, well if you aim for 6k miles...nothing...if you aim for 12 (or 15k) you could be running a risk. |
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11-25-2011, 09:17 AM | #38 | |
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11-25-2011, 10:14 AM | #39 | |
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11-25-2011, 10:48 AM | #40 |
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"Smug, Left Coast Newbie vs Seasoned East Coast Vet" Wow....the epic battle between Cali newbie know-it-all TotalPower and the venerable VA veteran ENINTY as they discuss with visceral viscosity the question of if it's too oily or too late to change the synthetic oil made expensive by Castrol through the branding by BMW and years of engineering and real world data on oil change frequency... Stay tuned for the sequel to the oil change wars..."slippery slope to slogging it out on the forum" Anyone for a Xanax?
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11-25-2011, 11:37 AM | #41 | |
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11-25-2011, 12:23 PM | #42 |
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LOL...You're OK, bro.
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11-25-2011, 04:20 PM | #43 | |
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http://neptune.spacebears.com/cars/stories/mobil1.html In addition to anti-wear capability of phosphorus they also tested extended drain intervals as noted in the SAE Paper Overview listed below. "...In addition to fresh oils, long drain used oils from fleet vehicles were also analyzed and investigated..." |
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